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Title

Effect of Native Oxide Film on Commercial Magnesium Alloys Substrates and Carbonate Conversion Coating Growth and Corrosion Resistance

AuthorsFeliú Jr., S.; Samaniego, Alejandro; Bermúdez, Elkin Alejandro; El Hadad, Amir A.; Llorente, Irene; Galván Sierra, Juan Carlos
KeywordsMagnesium
XPS
SEM
Passivity
Segregation
Issue Date28-Mar-2014
PublisherMultidisciplinary Digital Publishing Institute
CitationMaterials 7(4): 2534-2560 (2014)
AbstractPossible relations between the native oxide film formed spontaneously on the AZ31 and AZ61 magnesium alloy substrates with different surface finish, the chemistry of the outer surface of the conversion coatings that grows after their subsequent immersion on saturated aqueous NaHCO3 solution treatment and the enhancement of corrosion resistance have been studied. The significant increase in the amount of aluminum and carbonate compounds on the surface of the conversion coating formed on the AZ61 substrate in polished condition seems to improve the corrosion resistance in low chloride ion concentration solutions. In contrast, the conversion coatings formed on the AZ31 substrates in polished condition has little effect on their protective properties compared to the respective as-received surface
Publisher version (URL)http://dx.doi.org/10.3390/ma7042534
URIhttp://hdl.handle.net/10261/102104
DOI10.3390/ma7042534
ISSN1996-1944
E-ISSN1996-1944
Appears in Collections:(CENIM) Artículos
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